Prestahop Modul

We have a module in our shop for exporting invoices as CSV (Rechnung - Gutschriftsbeleg-Export (CRON / FTP / EMAIL)). However, it is so that only a tax amount is spent. We have two tax types in our shop (7% and 19%). The module should therefore display the sterling amount for 7 % per invoice in one column and the tax amount for 19 % in the other column. but the shop makes two sums, there are two sums on the invoice. so there must be separate sums in the database. Only the module cannot do that and makes a total.